Spraying arm for cleaning machine and cleaning machine

Abstract

The spraying arm comprises a body, a water outlet is formed in the side wall of the body, a nozzle is connected to the water outlet in a rotating mode, a water inlet sleeve capable of being matched with the water outlet in an inserted mode is arranged at the bottom of the nozzle, and a matching face matched with the inner wall of the water outlet in a rotating mode is formed on the peripheral wall of the lower portion of the water inlet sleeve. A protruding ring arranged in the circumferential direction is arranged on the peripheral wall of the upper portion of the water inlet sleeve, and a limiting assembly capable of moving in the radial direction relative to the water inlet sleeve is arranged on the upper surface of the body. When the water inlet sleeve is inserted into the water outlet, the protruding ring exerts force on the top of the limiting assembly, the limiting assembly moves outwards in the radial direction of the water inlet sleeve so as to give way to the protruding ring, the water inlet sleeve can be smoothly inserted into the water outlet under the condition that the water inlet sleeve is not subjected to rigid extrusion, and after the water inlet sleeve and the water outlet are inserted in a matched mode, the limiting assembly resets and limits the top of the protruding ring. The whole nozzle installation process is simple and convenient, and the installation reliability and the rotation stability of the nozzle can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of dishwashers, in particular to a spray arm for a washing machine and a washing machine. Background Art

[0002] Dishwashers are generally provided with a spray arm that rinses dishes or fruits and vegetables by spraying water jets. For example, the applicant's prior application CN202211611048.7 "A washing machine" discloses a structure, which includes a box and a spray arm, the spray arm is rotatably arranged in the box, the spray arm is provided with a hollow flow channel, the spray arm is also provided with a water outlet connected to the flow channel, the water outlet is connected to a nozzle that can rotate relative to the spray arm, and the upper surface of the spray arm is provided with a concave installation groove for installing the nozzle and in a semi-enclosed structure.

[0003] The above structure is provided with a nozzle at the end of the spray arm which can rotate with the spray arm and can rotate relative to the spray arm, which is conducive to eliminating the cleaning dead angle. The nozzle is constrained on the spray arm by the claw at its water inlet. During assembly, the claw is inserted into the connection hole of the spray arm by deformation and extrusion, which can easily cause the water inlet of the nozzle to break or be damaged, affecting the rotation stability of the nozzle or causing water leakage. Utility Model Content

[0004] The first technical problem to be solved by the utility model is to provide a spray arm for a cleaning machine which can protect the connection structure between the nozzle and the spray arm during the assembly process, thereby improving the stability of the nozzle.

[0005] The second technical problem to be solved by the utility model is to provide a cleaning machine using the above-mentioned spray arm in view of the current status of the prior art.

[0006] The technical solution adopted by the utility model to solve at least one of the above technical problems is:

[0007] A spray arm for a cleaning machine comprises a body with a flow channel, a water outlet connected to the flow channel is provided on the side wall of the body, a nozzle is rotatably connected to the water outlet, a water inlet sleeve which can be plugged into and rotatably connected to the water outlet is provided at the bottom of the nozzle, the outer peripheral wall of the lower part of the water inlet sleeve forms a mating surface which is rotatably matched with the inner wall of the water outlet, the outer peripheral wall of the upper part of the water inlet sleeve is provided with a circumferentially arranged convex ring, and the upper surface of the body is provided with a limit assembly which can move radially relative to the water inlet sleeve, and the limit assembly and the convex ring always maintain a tendency to be engaged and limited.

[0008] The utility model provides a convex ring on the outer periphery of the water inlet sleeve of the nozzle, and when the water inlet sleeve is inserted into the water outlet, the convex ring applies force on the top of the limiting component, and the limiting component moves radially outward along the water inlet sleeve to make way for the convex ring, so that the water inlet sleeve can be smoothly inserted into the water outlet without being subjected to hard squeezing. After the water inlet sleeve and the water outlet are completely plugged in, the limiting component is reset and limits the top of the convex ring to prevent the water inlet sleeve from being separated from the spray arm body. The entire nozzle installation process is simple and convenient, and damage to the connection structure between the nozzle and the spray arm due to hard squeezing is avoided, which is beneficial to improving the installation reliability and rotation stability of the nozzle.

[0009] Preferably, the limiting assembly includes a limiting strip and an elastic member, the limiting strip can be constrained at the top of the body to move back and forth along the radial direction of the water inlet sleeve, the first end of the limiting strip is used to engage with the top of the convex ring for limiting, and the elastic member is arranged under the limiting strip and elastically constrains the limiting strip to the body. With the above structure, the elastic member is used to realize the movement and reset of the limiting strip, which is conducive to improving the assembly reliability of the nozzle water inlet sleeve, and the elastic member provides radial support force to the convex ring through the limiting strip, which is conducive to smooth rotation of the water inlet sleeve and avoids jamming.

[0010] Preferably, the first end of the limit strip is arranged close to the water inlet sleeve and has a notch extending inward from the end at the bottom. The limit strip portion above the notch constitutes an elastic holding portion that can be pressed on the convex ring. A first guide surface that gradually tilts downward toward the water inlet sleeve is formed at the top of the elastic holding portion. Correspondingly, a second guide surface that gradually tilts upward outward is formed at the bottom edge of the convex ring. When the convex ring moves downward with the water inlet sleeve, the first guide surface and the second guide surface cooperate in a guiding manner. With the above structure, during the process of plugging the water inlet sleeve and the water outlet of the nozzle, damage to the various parts caused by hard extrusion is avoided, making the assembly process smoother. The structure of the notch makes the limiting of the convex ring more reliable after assembly.

[0011] Preferably, a protrusion is provided at the bottom of the limit strip, and a slide groove extending radially along the water inlet jacket and for the protrusion to slide in the top wall of the main body is provided. The cross section of the slide groove is formed into a trapezoidal structure with a small upper end and a large lower end, and correspondingly, the protrusion is adapted to the trapezoidal structure. The above structure facilitates the limit strip to be slidably constrained on the main body.

[0012] Preferably, there are two elastic members, the first elastic member is elastically compressed between one end of the slideway close to the water inlet jacket and the protrusion, and the second elastic member is elastically compressed between the other end of the slideway and the protrusion, and the elastic force of the second elastic member is greater than the elastic force of the first elastic member so that the limit bar always maintains a tendency to move toward the water inlet jacket. The above structure can further improve the assembly reliability and stability of the limit bar and the body, and exert a radial balancing force on the circumference of the water inlet jacket through the convex ring.

[0013] Preferably, the outer peripheral wall of the water inlet sleeve is provided with a drainage gap extending in the axial direction so that the water in the flow channel can be discharged from the water outlet. The water inlet sleeve of the utility model is directly plugged with the water outlet without setting a clamping foot at the bottom of the water inlet sleeve. The assembly gap required by the two is very small. The water flow pressure at the connection between the water inlet sleeve and the water outlet is very large. The impact of the high-pressure water flow may cause the nozzle to be easily stuck during rotation. The above-mentioned drainage gap is set to actively release part of the pressure, which is conducive to improving the smoothness and stability of the rotation of the nozzle.

[0014] Preferably, there are three drainage slits and they are evenly distributed around the circumference of the water inlet sleeve, so as to divide the convex ring into three relatively independent sections. Correspondingly, there are also three limit strips and they are evenly distributed around the periphery of the water inlet sleeve, and the width of the limit strips is greater than the width of the drainage slits. The above structure ensures that the limit strips are stably connected between the two sections of the convex ring, so that the nozzle can rotate stably.

[0015] A cleaning machine comprises a box body, a concave water return area is arranged at the bottom of the box body, the top of the water return area is covered with a filter plate, and also comprises the above-mentioned spray arm, which is rotatably arranged on the filter plate and connected to the water return area through a water pump mechanism.

[0016] Compared with the prior art, the utility model has the following advantages: the utility model provides a convex ring on the outer periphery of the water inlet sleeve of the nozzle, and when the water inlet sleeve is inserted into the water outlet, the convex ring applies force on the top of the limiting component, and the limiting component moves radially outward along the water inlet sleeve to make way for the convex ring, so that the water inlet sleeve can be smoothly inserted into the water outlet without being subjected to hard squeezing; after the water inlet sleeve and the water outlet are fully mated, the limiting component is reset and limits the top of the convex ring to prevent the water inlet sleeve from separating from the spray arm body; the entire nozzle installation process is simple and convenient, and damage to the connection structure between the nozzle and the spray arm caused by hard squeezing is avoided, which is beneficial to improving the installation reliability and rotation stability of the nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the spray arm of an embodiment of the utility model;

[0018] Figure 2 for Figure 1 Schematic diagram of the bottom structure;

[0019] Figure 3 for Figure 1 A partial cross-sectional view of

[0020] Figure 4 This is a diagram showing the coordination of the nozzle and the limiting assembly in an embodiment of the present utility model. DETAILED DESCRIPTION

[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0022] like Figures 1 to 4 As shown, the spray arm for the washing machine of this embodiment includes a main body 1 extending in the length direction, and the main body 1 is hollow inside to form a flow channel 12, and the flow channel 12 also extends in the length direction of the main body 1. A water inlet 13 connected to the flow channel is provided at the central part of the bottom wall of the main body 1, and a plurality of spray holes arranged at intervals and connected to the flow channel are provided on the top wall of the main body 1. A water outlet 15 arranged near the end is provided on the top wall of the main body 1, and a nozzle 2 that can rotate relative to the main body 1 is rotatably connected to the water outlet 15, and a spray hole is provided on the nozzle 2. The nozzle 2 is located at the end of the spray arm, and while rotating with the spray arm, it can also rotate by itself, so as to spray the outer periphery of the bowl basket and the inner wall of the washing chamber, so as to further eliminate the cleaning dead corners and improve the cleaning effect.

[0023] A water inlet sleeve 21 which can be plugged into and rotatably connected to the water outlet 15 is provided at the bottom of the nozzle 2. The outer peripheral wall of the lower part of the water inlet sleeve 21 forms a mating surface 211 which is rotatably matched with the inner wall of the water outlet 15. The outer peripheral wall of the upper part of the water inlet sleeve 21 is provided with a circumferentially arranged convex ring 22. The upper surface of the body 1 is provided with a limit assembly 3 which can move radially relative to the water inlet sleeve 21. The limit assembly 3 and the convex ring 22 always maintain a tendency to be clamped and limited.

[0024] The limiting assembly 3 comprises a limiting strip 31 and an elastic member 32. The limiting strip 31 can be constrained at the top of the body 1 to reciprocate along the radial direction of the water inlet sleeve 21. The first end of the limiting strip 31 is used to engage with the top of the convex ring 22 for limiting. The elastic member 32 is arranged under the limiting strip 31 and elastically constrains the limiting strip 31 on the body 1. With the above structure, the elastic member 32 is used to realize the movement and reset of the limiting strip 31, which is conducive to improving the assembly reliability of the water inlet sleeve 21 of the nozzle 2. In addition, the elastic member 32 provides radial support force to the convex ring 22 through the limiting strip 31, which is conducive to smooth rotation of the water inlet sleeve 21 and avoids jamming.

[0025] The first end of the limiting strip 31 is arranged near the water inlet sleeve 21 and has a notch groove 311 extending inward from the end at the bottom. The limiting strip portion above the notch groove 311 constitutes an elastic holding portion 312 that can be pressed on the convex ring 22. The top of the elastic holding portion 312 is formed with a first guide surface 01 that gradually tilts downward toward the water inlet sleeve 21. Correspondingly, a second guide surface 02 that gradually tilts upward outward is formed at the bottom edge of the convex ring 22. When the convex ring 22 moves downward with the water inlet sleeve 21, the first guide surface 01 and the second guide surface 02 are guided and matched. With the above structure, during the plug-in process of the water inlet sleeve 21 and the water outlet 15 of the nozzle 2, damage to each part caused by hard extrusion is avoided, making the assembly process smoother. The structure of the notch groove 311 makes the limiting of the convex ring 22 more reliable after assembly.

[0026] The bottom of the limit strip 31 is provided with a protrusion 313, and the top wall of the main body 1 is provided with a slide groove 11 extending radially along the water inlet jacket 21 and for the protrusion 313 to slide in. The cross section of the slide groove 11 is formed into a trapezoidal structure with a small upper end and a large lower end, and the protrusion 313 is correspondingly adapted to the trapezoidal structure. The above structure facilitates the limit strip 31 to be slidably constrained on the main body 1.

[0027] In this embodiment, one limit assembly 3 is provided with two elastic members 32, the first elastic member 32 is elastically compressed between one end of the chute 11 close to the water inlet jacket 21 and the protrusion 313, and the second elastic member 32 is elastically compressed between the other end of the chute 11 and the protrusion 313, and the elastic force of the second elastic member 32 is greater than the elastic force of the first elastic member 32, so that the limit strip 31 always maintains a tendency to move toward the water inlet jacket 21. The above structure can further improve the assembly reliability and stability of the limit strip 31 and the body 1, and exert a radial balancing force on the circumference of the water inlet jacket 21 through the protrusion 22.

[0028] The outer peripheral wall of the water inlet sleeve 21 is provided with a water drainage gap 213 extending in the axial direction so as to allow water in the flow channel 12 to drain outward from the water outlet 15. The water inlet sleeve 21 of this embodiment is directly plugged with the water outlet 15 without providing a clamping foot at the bottom of the water inlet sleeve 21. The assembly gap required for the two is very small. The water flow pressure at the connection between the water inlet sleeve 21 and the water outlet 15 is very large. The impact of the high-pressure water flow may cause the nozzle 2 to be easily stuck during rotation. The above-mentioned water drainage gap 213 is provided to actively release part of the pressure, which is conducive to improving the smoothness and stability of the rotation of the nozzle 2.

[0029] There are three drainage slits 213 uniformly distributed around the circumference of the water inlet sleeve 21, thereby dividing the convex ring 22 into three relatively independent sections. Correspondingly, there are three limit strips 31 uniformly distributed around the periphery of the water inlet sleeve 21, and the width of the limit strips 31 is greater than the width of the drainage slits 213. The above structure ensures that the limit strips 31 are stably connected between the two sections of the convex ring 22, so that the nozzle 2 can rotate stably.

[0030] The cleaning machine of this embodiment includes a box body, a concave water return area is provided at the bottom of the box body, the top of the water return area is covered with a filter plate, and also includes the above-mentioned spray arm, which is rotatably provided on the filter plate and is connected to the water return area through a water pump mechanism. A slag collection basket for collecting slag during the cleaning process is also provided, the lower part of the slag collection basket is accommodated in the water return area, and the top of the slag collection basket has a slag collection port exposed from the filter plate to facilitate slag collection.

[0031] In this embodiment, a convex ring 22 is provided on the outer periphery of the water inlet sleeve 21 of the nozzle 2. When the water inlet sleeve 21 is inserted into the water outlet 15, the convex ring 22 applies force on the top of the limiting component 3. The limiting component 3 moves radially outward along the water inlet sleeve 21 to make way for the convex ring 33, so that the water inlet sleeve 21 can be smoothly inserted into the water outlet 15 without being subjected to hard squeezing. After the water inlet sleeve 21 and the water outlet 15 are fully mated, the limiting component 3 is reset and limits the top of the convex ring 22 to prevent the water inlet sleeve 21 from being separated from the spray arm body 1. The entire nozzle 2 installation process is simple and convenient, and the damage to the connection structure between the nozzle 2 and the spray arm caused by hard squeezing is avoided, which is beneficial to improving the installation reliability and rotation stability of the nozzle.

[0032] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A spray arm for a cleaning machine, comprising a body (1) having a flow channel (12), a water outlet (15) connected to the flow channel (12) being provided on a side wall of the body (1), a nozzle (2) being rotatably connected to the water outlet (15), characterized in that: The bottom of the nozzle (2) is provided with a water inlet sleeve (21) which can be plugged into and rotatably connected with the water outlet (15); the outer peripheral wall of the lower part of the water inlet sleeve (21) forms a matching surface (211) which is rotatably matched with the inner wall of the water outlet (15); the outer peripheral wall of the upper part of the water inlet sleeve (21) is provided with a convex ring (22) arranged along the circumferential direction; the upper surface of the body (1) is provided with a limit assembly (3) which can move radially relative to the water inlet sleeve (21); the limit assembly (3) and the convex ring (22) always maintain a tendency to be engaged and limited.

2. The spray arm for a cleaning machine according to claim 1, characterized in that: The limiting assembly (3) comprises a limiting strip (31) and an elastic member (32); the limiting strip (31) can be constrained on the top of the main body (1) to move back and forth radially along the water inlet jacket (21); the first end of the limiting strip (31) is used to engage with the top of the convex ring (22) for limiting; the elastic member (32) is arranged under the limiting strip (31) and elastically constrains the limiting strip (31) on the main body (1).

3. The spray arm for a cleaning machine according to claim 2, characterized in that: The first end of the limiting strip (31) is arranged close to the water inlet jacket (21) and has a notch groove (311) extending inward from the end at the bottom. The portion of the limiting strip (31) above the notch groove (311) constitutes an elastic holding portion (312) capable of being pressed on the convex ring (22).

4. The spray arm for a cleaning machine according to claim 3, characterized in that: A first guide surface (01) which is gradually inclined downward toward the water inlet sleeve (21) is formed at the top of the elastic holding portion (312), and correspondingly, a second guide surface (02) which is gradually inclined outward and upward is formed at the bottom edge of the convex ring (22). When the convex ring (22) moves downward with the water inlet sleeve (21), the first guide surface (01) and the second guide surface (02) are guided and matched.

5. The spray arm for a cleaning machine according to claim 2, characterized in that: A protrusion (313) is provided at the bottom of the limiting strip (31), and a sliding groove (11) extending radially along the water inlet jacket (21) and for the protrusion (313) to slide in is provided on the top wall of the main body (1).

6. The spray arm for a cleaning machine according to claim 5, characterized in that: There are two elastic members (32), the first elastic member (32) is elastically compressed between one end of the slide groove (11) close to the water inlet sleeve (21) and the protrusion (313), and the second elastic member (32) is elastically compressed between the other end of the slide groove (11) and the protrusion (313), and the elastic force of the second elastic member (32) is greater than the elastic force of the first elastic member (32), so that the limit strip (31) always maintains a tendency to move toward the water inlet sleeve (21).

7. The spray arm for a cleaning machine according to claim 5, characterized in that: The cross section of the slide groove (11) is formed into a trapezoidal structure with a small upper end and a large lower end, and correspondingly, the protrusion (313) is adapted to the trapezoidal structure.

8. The spray arm for a cleaning machine according to any one of claims 2 to 7, characterized in that: The outer peripheral wall of the water inlet jacket (21) is provided with a water drainage gap (213) extending in the axial direction so as to allow water in the flow channel (12) to drain outward from the water outlet (15).

9. The spray arm for a cleaning machine according to claim 8, characterized in that: There are three drainage slits (213) which are evenly distributed in the circumferential direction of the water inlet sleeve (21), thereby dividing the convex ring (22) into three relatively independent sections. Correspondingly, there are also three limit strips (31) which are evenly distributed on the periphery of the water inlet sleeve (21), and the width of the limit strips (31) is greater than the width of the drainage slits (213).

10. A cleaning machine, comprising a box, wherein a concave water return area is provided at the bottom of the box, and a filter plate is covered on the top of the water return area, characterized in that: It also comprises a spray arm according to any one of claims 1 to 9, wherein the spray arm is rotatably disposed on the filter plate and is connected to the water return area through a water pump mechanism.

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